GLB Vanquish is used to clear cloudy water of pink, white, and clear slime. Pink slime is not an algae. It is formed by bacteria and cannot be destroyed by traditional algaecides. This product's powerful formula gets rid of slime problems quickly. Vanquish is effective in any pool type including those sanitized with biguanide. Swimming may be resumed shortly after application. This product is compatible with chlorine, bromine, ozone, salt water pools, and biguanide sanitizers.